"Everyman's Jet Engine" - Why Valveless Pulsejets? With fuel nozzle replacement, can be set up for almost any known combustible fuel Valveless pulsejets have been run successfully with almost every type of combustible fuel imaginable, including propane, acetylene and hydrogen gases, and liquid fuels from ethyl ether to light diesel, and in at least one case a very large engine was run on powdered solids. Ross Gordon of New Zealand demonstrated at least one of his engines running heavily used paint thinner! I think that used cooking oil has been tried as well. The only basic difference in burning a variety of fuels is the fuel nozzle used (since liquids will generally need to be sprayed in as a fine mist, using moderately high pressure). Experimentation is being done on carburetion (i.e. unassisted engine draft) of light liquids such as petrol (gasoline). Note that a given engine will not be ideally tuned for all fuels, due to varying temperature of combustion gases contained in the engine.